Article2009

Trace Elemental Analysis of Titanium Dioxide Pigments and Automotive White Paint Fragments for Forensic Examination Using High‐Energy Synchrotron Radiation X‐Ray Fluorescence Spectrometry*

Yoshinori Nishiwaki · Osamu Shimoda · Yasuhiro Saito · Toshio Nakanishi · Yasuko Terada · Toshio Ninomiya +1 more

25 citations0/0 files storedJournal of Forensic Sciences

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Cultural Heritage Materials Analysis Electron and X-Ray Spectroscopy Techniques X-ray Spectroscopy and Fluorescence Analysis

Abstract

High-energy synchrotron radiation x-ray fluorescence spectrometry (SR-XRF) utilizing 116 keV x-rays was used to characterize titanium dioxide pigments (rutile) and automotive white paint fragments for forensic examination. The technique allowed analysis of K lines of 9 trace elements in 18 titanium dioxide pigments (rutile), and 10 trace elements in finish coat layers of seven automotive white paint fragments. High-field strength elements (HFSE) were found to strongly reflect the origin of the titanium dioxide (TiO(2)) pigments, and could be used as effective parameters for discrimination and classification of the pigments and paint fragments. A pairwise comparison of the finish coat layers of seven automotive white paint fragments was performed. The trace elements in the finish coat layers detected by the high-energy SR-XRF were especially effective for identification. By introducing the trace element information of primer and electrocoat layers, all the automotive white paint fragments could be discriminated by this technique.

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References

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2012Development of heavy mineral and heavy element database of soil sediments in Japan using synchrotron radiation X-ray powder diffraction and high-energy (116keV) X-ray fluorescence analysis 2020Nondestructive Differentiation of Polyester Single White Fibers Using Synchrotron Radiation Microbeam X‐ray Fluorescence Spectrometry with Vertical Focusing

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